summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/coda/imx-vdoa.c
blob: 669a4c82f1ffa4c79b5e47173536faedecf52c34 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
/*
 * i.MX6 Video Data Order Adapter (VDOA)
 *
 * Copyright (C) 2014 Philipp Zabel
 * Copyright (C) 2016 Pengutronix, Michael Tretter <kernel@pengutronix.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
#include <linux/slab.h>

#include "imx-vdoa.h"

#define VDOA_NAME "imx-vdoa"

#define VDOAC		0x00
#define VDOASRR		0x04
#define VDOAIE		0x08
#define VDOAIST		0x0c
#define VDOAFP		0x10
#define VDOAIEBA00	0x14
#define VDOAIEBA01	0x18
#define VDOAIEBA02	0x1c
#define VDOAIEBA10	0x20
#define VDOAIEBA11	0x24
#define VDOAIEBA12	0x28
#define VDOASL		0x2c
#define VDOAIUBO	0x30
#define VDOAVEBA0	0x34
#define VDOAVEBA1	0x38
#define VDOAVEBA2	0x3c
#define VDOAVUBO	0x40
#define VDOASR		0x44

#define VDOAC_ISEL		BIT(6)
#define VDOAC_PFS		BIT(5)
#define VDOAC_SO		BIT(4)
#define VDOAC_SYNC		BIT(3)
#define VDOAC_NF		BIT(2)
#define VDOAC_BNDM_MASK		0x3
#define VDOAC_BAND_HEIGHT_8	0x0
#define VDOAC_BAND_HEIGHT_16	0x1
#define VDOAC_BAND_HEIGHT_32	0x2

#define VDOASRR_START		BIT(1)
#define VDOASRR_SWRST		BIT(0)

#define VDOAIE_EITERR		BIT(1)
#define VDOAIE_EIEOT		BIT(0)

#define VDOAIST_TERR		BIT(1)
#define VDOAIST_EOT		BIT(0)

#define VDOAFP_FH_MASK		(0x1fff << 16)
#define VDOAFP_FW_MASK		(0x3fff)

#define VDOASL_VSLY_MASK	(0x3fff << 16)
#define VDOASL_ISLY_MASK	(0x7fff)

#define VDOASR_ERRW		BIT(4)
#define VDOASR_EOB		BIT(3)
#define VDOASR_CURRENT_FRAME	(0x3 << 1)
#define VDOASR_CURRENT_BUFFER	BIT(1)

enum {
	V4L2_M2M_SRC = 0,
	V4L2_M2M_DST = 1,
};

struct vdoa_data {
	struct vdoa_ctx		*curr_ctx;
	struct device		*dev;
	struct clk		*vdoa_clk;
	void __iomem		*regs;
	int			irq;
};

struct vdoa_q_data {
	unsigned int	width;
	unsigned int	height;
	unsigned int	bytesperline;
	unsigned int	sizeimage;
	u32		pixelformat;
};

struct vdoa_ctx {
	struct vdoa_data	*vdoa;
	struct completion	completion;
	struct vdoa_q_data	q_data[2];
};

static irqreturn_t vdoa_irq_handler(int irq, void *data)
{
	struct vdoa_data *vdoa = data;
	struct vdoa_ctx *curr_ctx;
	u32 val;

	/* Disable interrupts */
	writel(0, vdoa->regs + VDOAIE);

	curr_ctx = vdoa->curr_ctx;
	if (!curr_ctx) {
		dev_dbg(vdoa->dev,
			"Instance released before the end of transaction\n");
		return IRQ_HANDLED;
	}

	val = readl(vdoa->regs + VDOAIST);
	writel(val, vdoa->regs + VDOAIST);
	if (val & VDOAIST_TERR) {
		val = readl(vdoa->regs + VDOASR) & VDOASR_ERRW;
		dev_err(vdoa->dev, "AXI %s error\n", val ? "write" : "read");
	} else if (!(val & VDOAIST_EOT)) {
		dev_warn(vdoa->dev, "Spurious interrupt\n");
	}
	complete(&curr_ctx->completion);

	return IRQ_HANDLED;
}

void vdoa_device_run(struct vdoa_ctx *ctx, dma_addr_t dst, dma_addr_t src)
{
	struct vdoa_q_data *src_q_data, *dst_q_data;
	struct vdoa_data *vdoa = ctx->vdoa;
	u32 val;

	vdoa->curr_ctx = ctx;

	src_q_data = &ctx->q_data[V4L2_M2M_SRC];
	dst_q_data = &ctx->q_data[V4L2_M2M_DST];

	/* Progressive, no sync, 1 frame per run */
	if (dst_q_data->pixelformat == V4L2_PIX_FMT_YUYV)
		val = VDOAC_PFS;
	else
		val = 0;
	writel(val, vdoa->regs + VDOAC);

	writel(dst_q_data->height << 16 | dst_q_data->width,
	       vdoa->regs + VDOAFP);

	val = dst;
	writel(val, vdoa->regs + VDOAIEBA00);

	writel(src_q_data->bytesperline << 16 | dst_q_data->bytesperline,
	       vdoa->regs + VDOASL);

	if (dst_q_data->pixelformat == V4L2_PIX_FMT_NV12 ||
	    dst_q_data->pixelformat == V4L2_PIX_FMT_NV21)
		val = dst_q_data->bytesperline * dst_q_data->height;
	else
		val = 0;
	writel(val, vdoa->regs + VDOAIUBO);

	val = src;
	writel(val, vdoa->regs + VDOAVEBA0);
	val = round_up(src_q_data->bytesperline * src_q_data->height, 4096);
	writel(val, vdoa->regs + VDOAVUBO);

	/* Enable interrupts and start transfer */
	writel(VDOAIE_EITERR | VDOAIE_EIEOT, vdoa->regs + VDOAIE);
	writel(VDOASRR_START, vdoa->regs + VDOASRR);
}
EXPORT_SYMBOL(vdoa_device_run);

int vdoa_wait_for_completion(struct vdoa_ctx *ctx)
{
	struct vdoa_data *vdoa = ctx->vdoa;

	if (!wait_for_completion_timeout(&ctx->completion,
					 msecs_to_jiffies(300))) {
		dev_err(vdoa->dev,
			"Timeout waiting for transfer result\n");
		return -ETIMEDOUT;
	}

	return 0;
}
EXPORT_SYMBOL(vdoa_wait_for_completion);

struct vdoa_ctx *vdoa_context_create(struct vdoa_data *vdoa)
{
	struct vdoa_ctx *ctx;
	int err;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return NULL;

	err = clk_prepare_enable(vdoa->vdoa_clk);
	if (err) {
		kfree(ctx);
		return NULL;
	}

	init_completion(&ctx->completion);
	ctx->vdoa = vdoa;

	return ctx;
}
EXPORT_SYMBOL(vdoa_context_create);

void vdoa_context_destroy(struct vdoa_ctx *ctx)
{
	struct vdoa_data *vdoa = ctx->vdoa;

	clk_disable_unprepare(vdoa->vdoa_clk);
	kfree(ctx);
}
EXPORT_SYMBOL(vdoa_context_destroy);

int vdoa_context_configure(struct vdoa_ctx *ctx,
			   unsigned int width, unsigned int height,
			   u32 pixelformat)
{
	struct vdoa_q_data *src_q_data;
	struct vdoa_q_data *dst_q_data;

	if (width < 16 || width  > 8192 || width % 16 != 0 ||
	    height < 16 || height > 4096 || height % 16 != 0)
		return -EINVAL;

	if (pixelformat != V4L2_PIX_FMT_YUYV &&
	    pixelformat != V4L2_PIX_FMT_NV12)
		return -EINVAL;

	/* If no context is passed, only check if the format is valid */
	if (!ctx)
		return 0;

	src_q_data = &ctx->q_data[V4L2_M2M_SRC];
	dst_q_data = &ctx->q_data[V4L2_M2M_DST];

	src_q_data->width = width;
	src_q_data->height = height;
	src_q_data->bytesperline = width;
	src_q_data->sizeimage =
		round_up(src_q_data->bytesperline * height, 4096) +
		src_q_data->bytesperline * height / 2;

	dst_q_data->width = width;
	dst_q_data->height = height;
	dst_q_data->pixelformat = pixelformat;
	switch (pixelformat) {
	case V4L2_PIX_FMT_YUYV:
		dst_q_data->bytesperline = width * 2;
		dst_q_data->sizeimage = dst_q_data->bytesperline * height;
		break;
	case V4L2_PIX_FMT_NV12:
	default:
		dst_q_data->bytesperline = width;
		dst_q_data->sizeimage =
			dst_q_data->bytesperline * height * 3 / 2;
		break;
	}

	return 0;
}
EXPORT_SYMBOL(vdoa_context_configure);

static int vdoa_probe(struct platform_device *pdev)
{
	struct vdoa_data *vdoa;
	struct resource *res;

	dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));

	vdoa = devm_kzalloc(&pdev->dev, sizeof(*vdoa), GFP_KERNEL);
	if (!vdoa)
		return -ENOMEM;

	vdoa->dev = &pdev->dev;

	vdoa->vdoa_clk = devm_clk_get(vdoa->dev, NULL);
	if (IS_ERR(vdoa->vdoa_clk)) {
		dev_err(vdoa->dev, "Failed to get clock\n");
		return PTR_ERR(vdoa->vdoa_clk);
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	vdoa->regs = devm_ioremap_resource(vdoa->dev, res);
	if (IS_ERR(vdoa->regs))
		return PTR_ERR(vdoa->regs);

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	vdoa->irq = devm_request_threaded_irq(&pdev->dev, res->start, NULL,
					vdoa_irq_handler, IRQF_ONESHOT,
					"vdoa", vdoa);
	if (vdoa->irq < 0) {
		dev_err(vdoa->dev, "Failed to get irq\n");
		return vdoa->irq;
	}

	platform_set_drvdata(pdev, vdoa);

	return 0;
}

static int vdoa_remove(struct platform_device *pdev)
{
	return 0;
}

static const struct of_device_id vdoa_dt_ids[] = {
	{ .compatible = "fsl,imx6q-vdoa" },
	{}
};
MODULE_DEVICE_TABLE(of, vdoa_dt_ids);

static struct platform_driver vdoa_driver = {
	.probe		= vdoa_probe,
	.remove		= vdoa_remove,
	.driver		= {
		.name	= VDOA_NAME,
		.of_match_table = vdoa_dt_ids,
	},
};

module_platform_driver(vdoa_driver);

MODULE_DESCRIPTION("Video Data Order Adapter");
MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
MODULE_ALIAS("platform:imx-vdoa");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud